birth date

noun

variants or less commonly birthdate

ˈbərth-ˌdāt 

plural birth dates also birthdates

: the calendar date on which someone or something was born : date of birth

There's even some question about his birth date—one source says 1854, another says 1856.

—Eugene Robinson

Of course, the registered horse has a recorded birth date, but many horses are not so fortunate.

—R. B. Warren

(figurative) Modern British drama does, however, have a precise and undisputed birthdate: May 8, 1956. It is opening night at the fledgling Royal Court …

—Timothy Mason

Examples of birth date in a Sentence

Recent Examples on the Web

Djena’s name was misspelled, and the birth date didn’t match the one on her passport. —Yudhijit Bhattacharjee, New Yorker, 18 May 2026

The subpoena had demanded Social Security numbers, birth dates, and medical records for all patients who received gender-affirming care in five years—revealing the government’s expansive investigative scope. —Kimberlee Kruesi, Los Angeles Times, 14 May 2026

According to the subpoenas, the DOJ had demanded Rhode Island Hospital hand over the birth dates, Social Security numbers and addresses of every patient who received transgender care over the past five years. —ABC News, 14 May 2026

Today marks the birth date of the influential free market economist, political philosopher and Nobel laureate. —The Editorial Board, Oc Register, 8 May 2026

Word History

First Known Use

1831, in the meaning defined above

Rhymes for birth date

• abate
• airfreight
• await
• baseplate
• berate
• birthdate
• birthrate
• bookplate
• borate
• breastplate
• bromate
• casemate